Locking device for springs.



No. 720,715. PATENTED FEB. 17, 1903..

G. c. LOGKLIN.

LOGKIN G DEVICE FOR SPRINGS. APPLICATION mum mm. 17, 1902.

v2H0 MODEL.

UNITED STATES PATENT OFFIC GEORGE O. LOOKLIN, OF CHICAGO, ILLINOIS.

LOCKING DEVICE FOR SPRINGS.

SPECIFICATION forming part of Letters Patent No. 720,715, dated February17, 1903.

A Application filed February 17, 1902- Serial No. 94,448. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE C. LOCKLIN, a citizen of the United States,residing at Ohicago,in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Looking Devices forSprings, of which the following is a specification.

The object of my invention is to provide a simple and effective meansfor securely locking a spring to the frame of a spring-bottom, so as toprevent the displacement of the spring lengthwise of its supporting-bar.This and such other objects as may hereinafter appear are attained bythe devices illustrated in the accompanying drawings, in which- Figure 1shows a section of a spring-bottom with a pair of coil-springs securedto the bottom frame thereof with myimproved device. Fig. 2 is anenlarged detail showingasection of a cross-bar of the spring-bottomprovided with locking-notches. Fig. 3is a detail showing the relativepositions of a cross-bar and a spring-locking member when assembled, thecross-bar being shown in section; and Fig. 4 is a detail showing themanner of attaching a spring to a cross-bar when a locking tie-strip isused instead of a locking tiewire, as shown in Fig. 1.

Like letters of reference indicate the same parts in the several figuresof the drawings.

Referring by letter to the accompanying drawings, A represents sectionsof cross-bars of a spring-bottom, upon which are mounted coil-springs B,which are attached thereto by means of a locking-wire C, which may alsoconstitute a tiewire to connect adjacent cross-bars A to each other. Thecross-barA is provided at the edge upon which the spring bears withnotches D, which are preferably semicircular in form and are spacedapart a distance equal to the diameter of that coil of the spring whichrests upon the bar A. The bar A may also be provided upon its oppositeedge with a notch E, located opposite to a point approximately midwaybetween the notches D. The size and shape of the notch E will dependupon .the size and shape of the locking member, which, as shown in thedrawings,-may either be a round wire O or a flat strip F or may be ofany other suitable or convenient size or shape.

In using my device the locking member,

and the bottom of the V-shaped portion being seated within the notch orrecess E. As so assembled, the lateral wings of the looking member willextend oppositely from each side of the bar A, with the under surfacesthereof approximately in or slightly below the same plane as thatoccupiedby the upper edge of the bar A. The free end of the coil-springB is next inserted under one of the laterallyextending portions of thelocking member 0, and the coil-spring being rotated or screwed intoposition this free end next passes over the adjacent upper edge of thebar A, then under the opposite wing of the locking member 0,

and thence upwardly over the edge of the bar' A, the portions of thespring in contact with the bar A being at the same time seated in thenotches D D. The parts will then occupy the relative positions shown inFig. 1. Owing to the fact that the wing portions of the looking member 0are in the same plane with or slightly below the plane of the upper edgeof the bar A, the bottom coil of the spring B has necessarily been putunder considerable tension in assembling the parts in the mannerdescribed, so that not only is the spring seated in the notches D D andthe V-shaped portion of the locking member 0 seated in the notch E, butbecause of such tension of the spring the parts are securely and rigidlyheld in the respective notches or seats provided for them, and so thesprings are simply and removably attached to the bar A in such a manneras to prevent any possibility of their displacement lengthwise of saidbar.

I have found that very satisfactory results may be attained by merelyproviding the seats D D, which receive thespring B and prevent itslateral displacement; but I preferthe double lock,'secured by providinga seat for the spring and a seat for the locking member. Where thelocking member consists of the strip F, of course the seat therefor isof a corresponding formation. So, also, in providing a seat for thespring, if desired as a matter of convenience or expediency, the upperedge of the bar A may be cut away between the notches D D, so as toprovide a single seat,

the essential idea beingto aiford shoulders or stops which shall abutagainst opposite sides of a coil of the spring which is in immediatecontact with the bar A, so as to positively prevent the sliding of thespring along the bar A.

Having thus described my invention, What I claim, and desire to secureby Letters Patent, is-

1. The combination with a cross-bar, of a coil-spring, means for lockingsaid spring against said bar, said bar being provided withoppositely-disposed shoulders, upon one edge thereof, arranged to abutagainst said spring, and being also provided with shoulders upon theopposite edge thereof, arranged to engage said locking means,substantially as described.

2. The combination with a coil-spring, of a supporting-bar arranged tobe in contact with a coil of said spring, said bar being provided withnotches in one edge thereof for receiving said coil at opposite sidesthereof, and with a third notch formed in its edge opposite to a pointbetween said first-mentioned notches, and means seated within said thirdnotch for locking said coil into said first-mentioned notches,substantially as described.

GEORGE (J. LOCKLIN.

Witnesses:

O. R. BARNETT, M. E. SHIELDS.

